PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-20:27:50
G07     339.4          60.2               10.3 +/-    0.17      11.7 +/-    0.17  0.110 / 0.180
G08     97.1           53.9               12.1 +/-    0.66      14.6 +/-    0.66  0.070 / 0.170
G09     188.6          69.5               12.3 +/-    0.85      13.0 +/-    0.85  0.040 / 0.050
G11     145.0          15.3               13.4 +/-    2.64      33.2 +/-    2.64  0.030 / 0.040
G23     156.0          34.0               12.0 +/-    0.89      19.4 +/-    0.89  0.090 / 0.160
G27     50.4           28.6                9.9 +/-    2.38      17.9 +/-    2.38  0.130 / 0.120
G28     241.5          33.7               10.2 +/-    1.35      16.6 +/-    1.35  0.040 / 0.040
G30     307.7          40.7                9.0 +/-    1.20      13.0 +/-    1.20  0.030 / 0.040